mfd: ipaq-micro: Convert prints to debug prints
[linux/fpc-iii.git] / arch / frv / include / asm / irqflags.h
blob82f0b5363f423d7d8c14ab28ab134819f4468a1f
1 /* FR-V interrupt handling
3 * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
12 #ifndef _ASM_IRQFLAGS_H
13 #define _ASM_IRQFLAGS_H
16 * interrupt flag manipulation
17 * - use virtual interrupt management since touching the PSR is slow
18 * - ICC2.Z: T if interrupts virtually disabled
19 * - ICC2.C: F if interrupts really disabled
20 * - if Z==1 upon interrupt:
21 * - C is set to 0
22 * - interrupts are really disabled
23 * - entry.S returns immediately
24 * - uses TIHI (TRAP if Z==0 && C==0) #2 to really reenable interrupts
25 * - if taken, the trap:
26 * - sets ICC2.C
27 * - enables interrupts
29 static inline void arch_local_irq_disable(void)
31 /* set Z flag, but don't change the C flag */
32 asm volatile(" andcc gr0,gr0,gr0,icc2 \n"
35 : "memory", "icc2"
39 static inline void arch_local_irq_enable(void)
41 /* clear Z flag and then test the C flag */
42 asm volatile(" oricc gr0,#1,gr0,icc2 \n"
43 " tihi icc2,gr0,#2 \n"
46 : "memory", "icc2"
50 static inline unsigned long arch_local_save_flags(void)
52 unsigned long flags;
54 asm volatile("movsg ccr,%0"
55 : "=r"(flags)
57 : "memory");
59 /* shift ICC2.Z to bit 0 */
60 flags >>= 26;
62 /* make flags 1 if interrupts disabled, 0 otherwise */
63 return flags & 1UL;
67 static inline unsigned long arch_local_irq_save(void)
69 unsigned long flags = arch_local_save_flags();
70 arch_local_irq_disable();
71 return flags;
74 static inline void arch_local_irq_restore(unsigned long flags)
76 /* load the Z flag by turning 1 if disabled into 0 if disabled
77 * and thus setting the Z flag but not the C flag */
78 asm volatile(" xoricc %0,#1,gr0,icc2 \n"
79 /* then trap if Z=0 and C=0 */
80 " tihi icc2,gr0,#2 \n"
82 : "r"(flags)
83 : "memory", "icc2"
88 static inline bool arch_irqs_disabled_flags(unsigned long flags)
90 return flags;
93 static inline bool arch_irqs_disabled(void)
95 return arch_irqs_disabled_flags(arch_local_save_flags());
99 * real interrupt flag manipulation
101 #define __arch_local_irq_disable() \
102 do { \
103 unsigned long psr; \
104 asm volatile(" movsg psr,%0 \n" \
105 " andi %0,%2,%0 \n" \
106 " ori %0,%1,%0 \n" \
107 " movgs %0,psr \n" \
108 : "=r"(psr) \
109 : "i" (PSR_PIL_14), "i" (~PSR_PIL) \
110 : "memory"); \
111 } while (0)
113 #define __arch_local_irq_enable() \
114 do { \
115 unsigned long psr; \
116 asm volatile(" movsg psr,%0 \n" \
117 " andi %0,%1,%0 \n" \
118 " movgs %0,psr \n" \
119 : "=r"(psr) \
120 : "i" (~PSR_PIL) \
121 : "memory"); \
122 } while (0)
124 #define __arch_local_save_flags(flags) \
125 do { \
126 typecheck(unsigned long, flags); \
127 asm("movsg psr,%0" \
128 : "=r"(flags) \
130 : "memory"); \
131 } while (0)
133 #define __arch_local_irq_save(flags) \
134 do { \
135 unsigned long npsr; \
136 typecheck(unsigned long, flags); \
137 asm volatile(" movsg psr,%0 \n" \
138 " andi %0,%3,%1 \n" \
139 " ori %1,%2,%1 \n" \
140 " movgs %1,psr \n" \
141 : "=r"(flags), "=r"(npsr) \
142 : "i" (PSR_PIL_14), "i" (~PSR_PIL) \
143 : "memory"); \
144 } while (0)
146 #define __arch_local_irq_restore(flags) \
147 do { \
148 typecheck(unsigned long, flags); \
149 asm volatile(" movgs %0,psr \n" \
151 : "r" (flags) \
152 : "memory"); \
153 } while (0)
155 #define __arch_irqs_disabled() \
156 ((__get_PSR() & PSR_PIL) >= PSR_PIL_14)
158 #endif /* _ASM_IRQFLAGS_H */